mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-20 13:22:19 +02:00
56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
package rendertarget
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// #cgo LDFLAGS: -framework OpenGL
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//
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// #include <OpenGL/gl.h>
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import "C"
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import (
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"github.com/hajimehoshi/go-ebiten/graphics/opengl/texture"
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"github.com/hajimehoshi/go-ebiten/graphics/rendertarget"
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)
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type Framebuffer C.GLuint
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func createFramebuffer(nativeTexture C.GLuint) C.GLuint {
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framebuffer := C.GLuint(0)
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C.glGenFramebuffers(1, &framebuffer)
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origFramebuffer := C.GLint(0)
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C.glGetIntegerv(C.GL_FRAMEBUFFER_BINDING, &origFramebuffer)
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C.glBindFramebuffer(C.GL_FRAMEBUFFER, framebuffer)
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defer C.glBindFramebuffer(C.GL_FRAMEBUFFER, C.GLuint(origFramebuffer))
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C.glFramebufferTexture2D(C.GL_FRAMEBUFFER, C.GL_COLOR_ATTACHMENT0,
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C.GL_TEXTURE_2D, nativeTexture, 0)
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if C.glCheckFramebufferStatus(C.GL_FRAMEBUFFER) !=
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C.GL_FRAMEBUFFER_COMPLETE {
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panic("creating framebuffer failed")
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}
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return framebuffer
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}
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func New(width, height int, filter texture.Filter) (
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*rendertarget.RenderTarget, error) {
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tex, err := texture.New(width, height, filter)
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if err != nil {
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return nil, err
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}
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f := func(native interface{}) interface{}{
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return createFramebuffer(C.GLuint(native.(texture.Native)))
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}
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framebuffer := tex.CreateFramebuffer(f)
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return rendertarget.NewWithFramebuffer(tex,
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Framebuffer(framebuffer.(C.GLuint))), nil
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}
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func NewWithFramebuffer(width, height int, framebuffer Framebuffer,
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filter texture.Filter) (*rendertarget.RenderTarget, error) {
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tex, err := texture.New(width, height, filter)
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if err != nil {
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return nil, err
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}
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return rendertarget.NewWithFramebuffer(tex, framebuffer), nil
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}
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